US President Barack Obama on Tuesday wrapped-up his two-day visit to the Philippines, the last leg of his four-nation Asia trip which also covered Japan, South Korea, and Malaysia.

Obama's plane, the Air Force One, left the Ninoy Aquino International Airport (NAIA) in the Philippine capital region of Metro Manila at around 11:30 a.m.

Before leaving Manila, he spoke before US and Filipino troops at Fort Bonifacio in Taguig City in the Philippine capital region of Metro Manila.

Obama paid homage to Filipino veterans who fought side by side with US soldiers during World War II.

He also reiterated that the United States is committed to defend the Philippines.

The Philippines is a long-standing ally of the United States in Southeast Asia. The two countries declared their "sense of unity" and their "common determination" to defend themselves against armed attacks in the Mutual Defense Treaty which was forged in 1951.

The two countries reaffirmed their alliance with the signing of a new military pact on Monday morning, a few hours after Obama arrived here to begin his state visit.

Dubbed as the "Enhanced Cooperation Defense Agreement (EDCA)," the 10-year military pact would expand the rotational presence of US forces in the country.

A few minutes after Obama left the country, hundreds of activists attempted to march towards the US embassy here to protest the forging of EDCA and express their opposition to the visit of the US president.

Policemen hosed down members of militant groups to prevent them from getting to the US embassy.